/**
 * 除法函数，用来得到精确的除法结果
 * @param arg1
 * @param arg2
 * @returns  arg1除以arg2的精确结果
 */
export function accDiv(arg1: number, arg2: number) {
  let t1 = 0,
    t2 = 0,
    r1 = 0,
    r2 = 0
  try {
    t1 = arg1.toString().split(`.`)[1].length
  } catch (e) {}
  try {
    t2 = arg2.toString().split(`.`)[1].length
  } catch (e) {}
  r1 = Number(arg1.toString().replace(`.`, ``))
  r2 = Number(arg2.toString().replace(`.`, ``))
  return (r1 / r2) * Math.pow(10, t2 - t1)
}

/**
 * 乘法函数，用来得到精确的乘法结果
 * @param arg1
 * @param arg2
 * @returns arg1乘以arg2的精确结果
 */
export function accMul(arg1: number, arg2: number) {
  let m = 0
  const s1 = arg1.toString()
  const s2 = arg2.toString()
  try {
    m += s1.split(`.`)[1].length
  } catch (e) {}
  try {
    m += s2.split(`.`)[1].length
  } catch (e) {}
  return (Number(s1.replace(`.`, ``)) * Number(s2.replace(`.`, ``))) / Math.pow(10, m)
}

/**
 * 加法函数，用来得到精确的加法结果
 * @param arg1
 * @param arg2
 * @returns arg1加上arg2的精确结果
 */
export function accAdd(arg1: number, arg2: number) {
  let r1,
    r2,
    m = 0
  try {
    r1 = arg1.toString().split(`.`)[1].length
  } catch (e) {
    r1 = 0
  }
  try {
    r2 = arg2.toString().split(`.`)[1].length
  } catch (e) {
    r2 = 0
  }
  m = Math.pow(10, Math.max(r1, r2))
  return (arg1 * m + arg2 * m) / m
}

/**
 * 减法函数，用来得到精确的减法结果
 * @param arg1
 * @param arg2
 * @returns arg1减去arg2的精确结果
 */
export function accSubtr(arg1: number, arg2: number) {
  let r1,
    r2,
    m = 0,
    n = 0
  try {
    r1 = arg1.toString().split(`.`)[1].length
  } catch (e) {
    r1 = 0
  }
  try {
    r2 = arg2.toString().split(`.`)[1].length
  } catch (e) {
    r2 = 0
  }
  m = Math.pow(10, Math.max(r1, r2))
  //动态控制精度长度
  n = r1 >= r2 ? r1 : r2
  return Number(((arg1 * m - arg2 * m) / m).toFixed(n))
}
